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2024 YANTAI Advanced Materials Exhibition , the leading event in the Advanced Ceramic Materials industry, concluded on April 26th after three days of insightful discussions. Shandong Huayi Tech showcased a diverse range of innovative and sustainable ceramic materisl solutions that garnered significant interest from industry professionals. Innovative Industry Solutions:

Boron carbide has a complex crystal structure, which is a characteristic of borides centered on the pentahedron. The B12 octahedron forms a rhombic lattice unit around the C-B-C chain at the center of the unit cell (space group: R3m, lattice constant: a=0.56 nm and c=1.212 nm), and all carbon atoms bridge adjacent three octahedra. The B12 octahedron and bridging carbon form a network plane parallel to the c-plane, which is stacked along the c-axis to form a layered structure. The two basic structural units of a lattice are the B12 octahedron and the B6 octahedron. Due to the small size of the B6 octahedron, it cannot be combined. On the contrary, they bind to the adjacent B12 octahedra, which weakens the bonding of the c-plane.

After sintering with a mixture of coarse and fine powders, the bonding of SiC ceramic particles is smaller and tighter compared to single powder sintering. Due to the moderate difference in particle size between the coarse and fine powders used, the fine particles can better fill the pores between the coarse particles. Therefore, after sintering, the grain size is more consistent, and the distribution of carbon and pores is more uniform, without obvious aggregation or abnormal grain growth.

1. Application of boron carbide in nuclear industry Boron carbide has a high neutron absorption cross-section and a wide energy spectrum for absorbing neutrons, and is commonly used as a neutron absorption material in nuclear reactors. The thermal cross-section of the boron 10 isotope is as high as 347 × 10-24cm2, second only to a few elements such as gadolinium, samarium, and cadmium, making it an efficient thermal neutron absorber. In addition, boron carbide is rich in resources, corrosion-resistant, has good thermal stability, does not produce radioactive isotopes, and has low secondary radiation energy. Therefore, boron carbide is widely used as a control material and shielding material in nuclear reactors.

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Silicon carbide (SiC) ceramics have enormous application space in fields such as semiconductors, energy, aerospace, catalysts, etc. Among them, SiC porous ceramics with high porosity have lighter weight, larger specific surface area, and higher porosity due to their unique structure. These excellent characteristics also make them play an important application value in many fields such as insulation, gas separation, high-temperature reactors, electromagnetic shielding, and catalyst carriers.

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